AC-939: Create unit test for Magento2\Less\AvoidIdSniff check

Author: eliseacornejo

Magento2/Tests/Less/AbstractLessSniffUnitTestCase.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Less;
+
+use PHP_CodeSniffer\Config;
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
+
+/**
+ * Implements an abstract base for unit tests that cover less sniffs.
+ */
+abstract class AbstractLessSniffUnitTestCase extends AbstractSniffUnitTest
+{
+    /**
+     * @inheritDoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        
+        $config = new Config();
+        $config->extensions = array_merge(
+            $config->extensions,
+            [
+                'less' => 'CSS'
+            ]
+        );
+        
+        $GLOBALS['PHP_CODESNIFFER_CONFIG'] = $config;
+    }
+}

Magento2/Tests/Less/AvoidIdUnitTest.php

@@ -5,9 +5,7 @@
  */
 namespace Magento2\Tests\Less;
 
-use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
-
-class AvoidIdUnitTest extends AbstractSniffUnitTest
+class AvoidIdUnitTest extends AbstractLessSniffUnitTestCase
 {
     /**
      * @inheritdoc
@@ -30,7 +28,7 @@ public function getErrorList()
             18 => 1,
             19 => 1,
             20 => 1,
-            21 => 3,
+            21 => 1,
             22 => 1,
             26 => 1,
             27 => 1,

Magento2/ruleset.xml

@@ -3,7 +3,7 @@
     <description>Magento Coding Standard</description>
 
     <!-- File extensions to be checked. -->
-    <arg name="extensions" value="php,phtml,graphqls/GraphQL,less"/>
+    <arg name="extensions" value="php,phtml,graphqls/GraphQL,less/CSS,html/PHP"/>
 
     <!-- Severity 10 errors: Critical code issues. -->
     <rule ref="Generic.Functions.CallTimePassByReference">